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Study of the influence of capping agents on the structural and optical properties of ZnO nanostructures

A. MATEI1,2,* , L. DUMITRESCU2, I. CERNICA1, V. TUCUREANU1, I. MIHALACHE1, B. BITA1, M. DANILA1, I. MANCIULEA2

Affiliation

  1. National Institute for Research and Development in Microtehnologie IMT- Bucharest, 126A, Erou Iancu Nicolae Street, 077190, Bucharest Romania
  2. Transilvania University of Brasov, Product Design and Environment Faculty, 29 Blvd Eroilor, 500036, Brasov, Romania

Abstract

In recent years, a lot of techniques for obtaining ZnO nanostructures were developed together with different methods for nanoparticles surface modification. Hence, the changing of particles chemical and physical properties improves their compatibility with different polymeric matrices leading to interesting, new practical applications of ZnO in various domains. In this study, the structural and optical properties of new types of ZnO nanoparticles surface modified with oleic acid and elaidic acid as capping agents are reported, that were used to control the size and the morphology of ZnO NPs. The suitable capping agents were chosen on the base of their ability to attach on the nanoparticles surface further improving their features. The structure and morphology of modified ZnO nanoparticles (ZnO-oleic acid and ZnO-elaidic acid) were analyzed in detail using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectrometry (FT-IR). The optical properties of the as-prepared samples also were investigated using photoluminescence (PL) and absorption spectroscopy. Results showed the particles size was in the range of 30-50 nm and the morphology of the synthesized NPs to be dependent on the capping agent. FTIR spectra indicated the types of functional groups present on the surface of ZnO nanoparticles..

Keywords

Zinc oxide, Nanoparticles, Surface modification, Oleic acid, Elaidic acid.

Submitted at: April 9, 2015
Accepted at: June 24, 2015

Citation

A. MATEI, L. DUMITRESCU, I. CERNICA, V. TUCUREANU, I. MIHALACHE, B. BITA, M. DANILA, I. MANCIULEA, Study of the influence of capping agents on the structural and optical properties of ZnO nanostructures, Journal of Optoelectronics and Advanced Materials Vol. 17, Iss. 7-8, pp. 952-957 (2015)